WO2019168216A1 - 콘크리트 압송 배관의 윤활층 활성화 장치 및 윤활층 활성화 방법 - Google Patents
콘크리트 압송 배관의 윤활층 활성화 장치 및 윤활층 활성화 방법 Download PDFInfo
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- WO2019168216A1 WO2019168216A1 PCT/KR2018/002431 KR2018002431W WO2019168216A1 WO 2019168216 A1 WO2019168216 A1 WO 2019168216A1 KR 2018002431 W KR2018002431 W KR 2018002431W WO 2019168216 A1 WO2019168216 A1 WO 2019168216A1
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- pipe
- chemical liquid
- concrete
- pressure
- unit
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/04—Pumps for special use
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B19/00—Machines or pumps having pertinent characteristics not provided for in, or of interest apart from, groups F04B1/00 - F04B17/00
- F04B19/20—Other positive-displacement pumps
- F04B19/22—Other positive-displacement pumps of reciprocating-piston type
Definitions
- the present invention relates to an apparatus for lubricating layer activation and a method for activating a lubricating layer of concrete pressurizing pipe. And a lubricating layer activation method.
- High pressure concrete pump is a very important element technology in the construction of high-rise structures and ultra-large structures.
- the most important substrate for determining the fluidity of concrete which determines the availability and efficiency of concrete pump transfer, is a fluidized bed called a slip layer.
- FIG. 1 is a view showing the flow of concrete in the pipe.
- the flow of concrete in the pipe may be classified into three layers. Plug flow region with constant flow rate and horizontal flow direction, shearing region where flow rate is reduced due to friction with pipes, and lubrication layer located outside of concrete flow layer).
- the pressure in the pressure feed pipe depends on the flow characteristics of the slip layer. If the formation and maintenance of the lubrication layer (Slip layer) is hindered by the secondary flow in the pipe and the disturbance of the aggregate, the flow rate of the concrete drops rapidly and the internal pressure of the pipe increases.
- Slip layer lubrication layer
- Korean Patent Registration No. 10-1249911 has been disclosed.
- the Republic of Korea Patent No. 10-1249911 is a technology for increasing the flow rate by changing the kinetic properties of the water molecules in the slip layer by the electromagnetic field by winding a coil on the outer surface of the pressure feed pipe.
- the Republic of Korea Patent No. 10-1249911 has a lubrication layer (Slip layer) is activated only in the pipe winding the coil is effective only in a limited pipe, the lubrication layer (Slip layer) only when a pulse signal is applied to the coil There is a problem that is activated and the activation effect is temporary.
- Lubrication layer activation device of the concrete pressurized pipe the pipe pressure sensor for measuring the pressure per unit area of the concrete to be fed into the pipe; and the chemical liquid for activating the flow of concrete on the inner peripheral surface of the concrete pressure pipe
- a chemical liquid injection unit for supplying a fixed amount of chemical liquid to the chemical liquid injection unit; and calculating an expected pressure per unit area of concrete according to the size of the concrete pumping pipe, the properties of the concrete, and the flow amount of concrete.
- a control unit which operates the chemical liquid pumping unit when the pipe internal pressure measured by the pipe internal pressure sensor is higher than the expected pressure and stops the operation of the chemical liquid pumping unit when the internal pipe pressure measured by the pipe internal pressure sensor is lower than the expected pressure. It is characterized by.
- Lubrication layer activation device and lubrication layer activation method of the concrete pressure pipe it is possible to activate the lubrication layer and to maintain the activated lubrication layer throughout the concrete pressure pipe.
- 1 is a view showing the flow of concrete in the pipe.
- Figure 2 is a view showing the configuration of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention.
- FIG 3 is an assembled perspective view of the chemical liquid injection unit of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention.
- Figure 4 is a perspective view of the first pipe and the second pipe of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention.
- FIG 5 is an assembled perspective view of the chemical liquid injection unit of the lubrication layer activation device of the concrete pressure pipe according to another embodiment of the present invention.
- FIG. 6 is a perspective view of the third pipe and the fourth pipe of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention.
- FIG. 7 is a detailed cross-sectional view showing a state in which the chemical liquid is stored in the annular slit of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention.
- Figure 8 is a detailed cross-sectional view showing a state in which the chemical liquid is injected in the annular slit (slit) of the lubricating layer activation device of the concrete pressure pipe according to an embodiment of the present invention.
- FIG. 9 is a detailed cross-sectional view showing a state in which the chemical liquid is stored in the annular slit of the lubrication layer activation device of the concrete pressure pipe according to another embodiment of the present invention.
- FIG. 10 is a detailed cross-sectional view showing a state in which the chemical liquid is injected in the annular slit of the lubrication layer activation device of the concrete pressure pipe according to another embodiment of the present invention.
- FIG. 11 is a flow chart of the lubricating layer activation method of the concrete pressure pipe according to an embodiment of the present invention.
- Lubrication layer activation device of the concrete pressurized pipe the pipe pressure sensor for measuring the pressure per unit area of the concrete to be fed into the pipe; and the chemical liquid for activating the flow of concrete on the inner peripheral surface of the concrete pressure pipe
- a chemical liquid injection unit for supplying a fixed amount of chemical liquid to the chemical liquid injection unit; and calculating an expected pressure per unit area of concrete according to the size of the concrete pumping pipe, the properties of the concrete, and the flow amount of concrete.
- a control unit which operates the chemical liquid pumping unit when the pipe internal pressure measured by the pipe internal pressure sensor is higher than the expected pressure and stops the operation of the chemical liquid pumping unit when the internal pipe pressure measured by the pipe internal pressure sensor is lower than the expected pressure. It is characterized by.
- the chemical liquid of the lubricating layer activation device of the concrete pressure pipe according to the embodiment of the present invention is characterized in that it comprises a concrete admixture or a cement paste.
- the first connection means connected to the pressure pipe is discharged concrete; first pipe provided on one side; and the radius of the outer diameter A reduced discharge portion which is gradually reduced to be smaller by 1 to 3 mm than the radius of the inner diameter of the first pipe; is provided on one side, the second connecting means connected to the pressure feeding pipe into which the concrete is introduced; the second pipe provided on the other side And at least two chemical liquid inlets connecting the other side of the first pipe and one side of the second pipe, and supplying the chemical liquid to an annular slit between the other side of the first pipe and the reduced discharge portion of the second pipe; It is characterized in that it comprises a; chemical liquid injection connector is evenly disposed on the outer peripheral portion.
- the chemical liquid injection unit of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention, the third connecting means connected to the pressure feeding pipe to which concrete is introduced; the third pipe provided on one side; and the radius of the inner diameter An enlarged inlet part which is gradually enlarged to be larger by 1 to 3 mm than the radius of the outer diameter of the third pipe; provided on one side and fourth connecting means connected to the pressure feeding pipe through which the concrete is discharged; the fourth pipe provided on the other side At least two or more chemical inlets for connecting the other side of the third pipe and one side of the fourth pipe, and supplying the chemical liquid to the annular slit between the other side of the third pipe and the enlarged inlet of the fourth pipe; It is characterized in that it comprises a; chemical liquid injection connector is evenly disposed on the outer peripheral portion.
- the chemical liquid pumping unit of the lubricating layer activation device of the concrete pressure pipe according to the embodiment of the present invention, a check valve for preventing the backflow of the chemical liquid supplied to the chemical liquid injection unit; and a piston for supplying the chemical liquid to the chemical liquid injection unit Chemical liquid pump of the type; And, a chemical liquid storage unit for storing the chemical liquid while stirring; Characterized in that it comprises a.
- the control unit of the lubrication layer activation device of the concrete pumping pipe by calculating the supply quantity of the chemical liquid supplied to the chemical liquid injection unit according to the flow amount of the concrete, the chemical liquid pumping unit injects the chemical liquid as the supply quantity It characterized in that the control to supply to the unit.
- the lubrication layer activation method of the concrete pressure pipe for quantitatively injecting a chemical solution containing a concrete admixture or cement paste in an annular shape to the inner peripheral surface of the concrete pressure pipe,
- An estimated pressure calculation step of calculating an expected pressure per unit area of concrete according to the size of the pressure feeding pipe, the properties of the concrete, and the flow amount of the concrete; and a pipe internal pressure measurement step of measuring a pipe pressure per unit area of the concrete in the concrete pumping pipe;
- Chemical liquid quantitative calculation step of calculating the quantification of the chemical liquid injected according to the flow amount of the concrete Comparing the estimated pressure calculated in the expected pressure calculation step with the internal pressure measured in the pipe pressure measurement step to determine the injection of the chemical liquid 1 pressure comparison step; and when the internal pressure of the pipe is higher than expected pressure
- ... unit means a unit for processing at least one function or operation, which means hardware or software or hardware and It can be implemented in a combination of software.
- Figure 2 is a view showing the configuration of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention.
- the lubrication layer activation device of the concrete pressure pipe As shown in Figure 2, the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention, the pipe pressure sensor 100 for measuring the pressure per unit area of the concrete to be fed into the pipe, and the inner peripheral surface of the concrete pressure pipe Chemical liquid injection unit 200 for injecting the chemical liquid 30 to activate the flow of the concrete in an annular form, Chemical liquid pumping unit 300 for supplying the chemical liquid 30 in the chemical liquid injection unit 200, and the concrete pressure Calculate the estimated pressure per unit area of the concrete according to the dimensions of the pipe 10, the properties of the concrete and the flow of concrete, and when the pipe internal pressure measured by the pipe pressure sensor 100 is higher than the expected pressure, the chemical pumping unit 300 It is characterized in that it comprises a control unit 400 for operating and stopping the operation of the chemical liquid pumping unit 300 when the pipe internal pressure measured by the pipe internal pressure sensor 100 is lower than the expected pressure.
- the chemical liquid 30 of the lubrication layer activation device of the concrete pressure pipe is characterized in that it comprises a concrete admixture or cement paste.
- the chemical liquid pumping unit 300 of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention, the check valve 310 to prevent the backflow of the chemical liquid supplied to the chemical liquid injection unit 200, and chemical liquid injection Piston-type chemical liquid pump 320 for supplying a fixed amount of chemical liquid to the unit 200, and a chemical liquid storage unit 330 for stirring and storing the chemical liquid, characterized in that it comprises a.
- control unit 400 of the lubrication layer activation device of the concrete pressure pipe by calculating the amount of supply of the chemical liquid supplied to the chemical liquid injection unit 200 according to the flow amount of the concrete, the chemical liquid pumping unit 300 is controlled to supply the chemical liquid to the chemical liquid injection unit 200 by the supply amount.
- the lubrication layer activation device of the concrete pressure pipe by quantitatively injecting a chemical solution containing a concrete admixture or cement paste in the annular circumference of the concrete pressure pipe 10 to generate a lubrication layer (Slip layer) It will be activated or activated.
- control unit 400 calculates and calculates the supply amount of the chemical liquid and the expected pressure of the concrete, and compares the pipe internal pressure and the estimated pressure of the concrete measured by the pipe internal pressure sensor 100, and if the pipe internal pressure is higher than the expected pressure, A fixed amount of chemical is injected into the outer circumferential surface of the concrete.
- the expected pressure per unit area of concrete is a pressure value that can be predicted by the dimensions of the concrete conveying pipe and the properties of concrete (viscosity and yield stress of concrete, viscosity and yield stress of slip layer) and the flow rate of concrete. It means the pressure when flows smoothly in the pipe.
- the internal pressure of the pipe is higher than the expected pressure, it means that the flow of concrete is not smooth and the lubrication layer is not activated. Therefore, it is possible to determine whether the lubrication layer is activated by measuring the internal pressure of the concrete in the pipe pressure sensor 100. Done.
- the chemical liquid is preferably a concrete admixture or a cement paste. This is to maintain the composition ratio of the concrete. Concrete admixtures or cement pastes do not affect the strength of concrete when injected in small amounts as components already contained in concrete flowing in the pipe. Calculating the supply amount of the chemical solution and injecting it in a quantitative manner is also to maintain the composition ratio of the concrete.
- the injection ratio of the chemical liquid is preferably 5% or less relative to the total amount of concrete.
- the control unit 400 stops the injection of the chemical from the time when the measured pressure is lower than the expected pressure. Stopping the chemical liquid injection into the concrete with the lubricating layer is to prevent waste of the chemical liquid and energy and to maintain the composition ratio of the concrete.
- the lubricating layer activated by injecting the chemical solution is not by an electrical or chemical method but by a physical method, and the effect is continuous. If the lubrication layer is not maintained due to secondary flow in the pipe and disturbance of the aggregate, it is possible to activate the lubrication layer again by the above physical activation method.
- the chemical liquid pumping unit 300 of the lubrication layer activation device of the concrete pressure pipe includes a check valve 310, a piston type chemical liquid pump 320, and a chemical liquid storage unit 330.
- the check valve 310 is positioned in the chemical liquid pumping unit 300 and the chemical liquid injection unit 200 to prevent the chemical liquid from flowing back.
- the chemical liquid is stably stored in the chemical liquid injection unit 200 through the check valve 310, which will be described in detail with reference to FIGS. 7 to 10.
- the chemical liquid pump 320 is preferably configured in a piston manner to supply and inject a fixed amount of chemical liquid. Piston type pumps are very advantageous for accurately supplying a fixed amount of chemical liquid.
- the chemical storage unit 330 accommodates and stirs the chemical liquid supplied to the chemical liquid pump 320. Since the chemical liquid is mainly composed of concrete admixture or cement paste, it is necessary to continuously stir to maintain the gal state and viscosity of the chemical liquid.
- FIG 3 is an assembled perspective view of a chemical injection unit of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention
- Figure 4 is a first view of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention
- the chemical liquid injection unit 200 of the lubrication layer activation device of the concrete pressure pipe As shown in Figure 3 and 4, the chemical liquid injection unit 200 of the lubrication layer activation device of the concrete pressure pipe according to the embodiment of the present invention, the first connection means 211 is connected to the pressure feed pipe is discharged concrete
- the first pipe 210 is provided on one side, and the reduced discharge portion 222 is gradually reduced so that the radius of the outer diameter is smaller by 1 ⁇ 3mm than the radius of the inner diameter of the first pipe 210 is provided on one side
- the second pipe 220 having the second connection means 221 connected to the pressure feeding pipe into which the concrete is introduced, and the other side 212 of the first pipe 210 and the reduction of the second pipe 220.
- At least a chemical liquid is connected to the discharge part 222 to supply an annular slit 230 between the other side 212 of the first pipe 210 and the reduced discharge part 222 of the second pipe 220.
- Two or more chemical liquid inlet 241 is characterized in that it comprises a chemical liquid injection connector 240 disposed evenly on the outer peripheral portion do.
- the chemical liquid injection unit 200 is a concrete pressurized pipe by an annular slit 230 formed by the other side 212 of the first pipe 210 and the reduced discharge portion 222 of the second pipe 220. It is possible to inject the chemical liquid 30 to the inner peripheral surface of the annular.
- the difference between the radius of the outer diameter of the reduced discharge portion 222 and the radius of the inner diameter of the other side 212 of the first pipe 210 is formed in about 2mm, which is the gap of the annular slit 230 to about 2mm It means to be formed. This is a dimension considering the diameter of a general concrete pressure pipe.
- the diameter of the concrete pressure pipe is formed as 125mm
- the size of the gap of the annular slit 230 (slit) (230) is about 2mm
- the amount of the chemical liquid injected can be 5% or less of the total concrete.
- the gap is smaller than about 2mm, the injection of the chemical solution is not smooth.
- first connecting means 211 and the second connecting means 221 are provided with the first connecting means 211 and the second connecting means 221, the first connecting means 211 and the second connecting means ( 221 is for installing the chemical liquid injection unit 200 between the pressure feed pipe.
- first connecting means 211 and the second connecting means 221 are shown as a flange, it is possible to use other connection method if the structure connecting the pressure pipe.
- the chemical liquid injection unit 200 includes a chemical liquid injection connector 240 connecting the other side of the first pipe 210 and one side of the second pipe 220. At least two or more chemical injection holes 241 are disposed at the outer circumference of the chemical injection hole 240, and the chemical liquid is evenly supplied to the annular slit 230.
- the chemical liquid injection unit 200 may be provided with a chemical liquid storage part 242 which is a space in which the chemical liquid is stored in the annular slit 230.
- the chemical liquid storage part 242 is a space for connecting the chemical liquid inlet 241 and the annular slit 230, and may be formed in an outer circumferential portion of the annular slit 230.
- the chemical liquid storage part 242 distributes the chemical liquid evenly around the annular slit 230 before the chemical liquid injected from the chemical liquid inlet 241 is temporarily stored and injected into the annular slit 230. To help.
- FIG 5 is a perspective view of the first pipe and the second pipe of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention
- Figure 6 is a lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention It is a perspective view of a 3 pipe and a 4th pipe.
- the chemical liquid injection unit 200 of the lubrication layer activation device of the concrete pressure pipe according to an embodiment of the present invention, the third connection means 251 connected to the pressure feed pipe to which concrete is introduced ) Is provided on one side of the third pipe 250 and an enlarged inlet portion 262 that is gradually enlarged so that the radius of the inner diameter is larger by 1 to 3 mm than the radius of the outer diameter of the third pipe 250.
- the fourth pipe 260 provided on the other side with the fourth connecting means 261 connected to the pressure feeding pipe through which the concrete is discharged, the other side of the third pipe 250 and one side of the fourth pipe 260.
- the chemical liquid injection unit 200 is a concrete pressurized pipe by an annular slit 230 formed by the other side 252 of the third pipe 250 and the enlarged inlet portion 262 of the fourth pipe 260. It is possible to inject the chemical liquid 30 to the inner peripheral surface of the annular.
- the difference between the radius of the outer diameter of the enlarged inlet portion 262 and the radius of the inner diameter of the other side 252 of the third pipe 250 is formed to be about 2mm, which is the gap of the annular slit 230 to about 2mm It means to be formed.
- the third connecting means 251 and the fourth connecting means 261 are shown as flanges, but another connection method may be used if the structure connects the pressure feeding pipes.
- the chemical liquid injection unit 200 includes a chemical liquid injection connector 240 connecting the other side of the third pipe 250 and one side of the fourth pipe 260. At least two or more chemical injection holes 241 are disposed at the outer circumference of the chemical injection hole 240, and the chemical liquid is evenly supplied to the annular slit 230.
- the chemical liquid injection unit 200 may be provided with a chemical liquid storage part 242 which is a space in which the chemical liquid is stored in the annular slit 230.
- the chemical liquid storage part 242 is a space for connecting the chemical liquid inlet 241 and the annular slit 230, and may be formed in an outer circumferential portion of the annular slit 230.
- the chemical liquid storage part 242 distributes the chemical liquid evenly around the annular slit 230 before the chemical liquid injected from the chemical liquid inlet 241 is temporarily stored and injected into the annular slit 230. To help.
- FIG. 7 is a detailed cross-sectional view showing a state in which the chemical liquid is stored in the annular slit of the lubricating layer activation device of the concrete pressure pipe according to an embodiment of the present invention
- Figure 8 is a concrete pressure feeding according to an embodiment of the present invention
- Detailed sectional drawing which shows the state which chemical liquid is inject
- 7 and 8 show the injection of the chemical liquid through the connection of the first pipe and the second pipe.
- FIG. 7 illustrates that the chemical liquid pumping unit 300 does not operate and stores the chemical liquid 30 in the state in which the chemical liquid 30 is charged.
- the chemical liquid 30 stored in the chemical liquid storage part 242 is prevented from backflow by the check valve 310 of the chemical liquid pumping unit 300, and spaced apart from the flow of the concrete 20 to prevent the chemical liquid storage part 242. It will remain stable inside.
- FIG. 8 shows that the chemical liquid pumping unit 300 operates to inject the chemical liquid 30 into the inner circumferential surface of the concrete pressure pipe 10 through the annular slit 230.
- the annular slit 230 is formed by a connection between the other side 212 of the first pipe 210 and the outlet discharge portion 222 of the second pipe 220.
- the chemical liquid 30 is annularly injected into the inner circumferential surface of the concrete pressure pipe 10 through the annular slit 230 to generate and activate a lubricating layer of concrete.
- the gap of the annular slit 230 is preferably formed in about 2 mm, as described above.
- Figure 9 is a detailed cross-sectional view showing a state in which the chemical liquid is stored in the annular slit (slit) of the lubrication layer activation device of the concrete pumping pipe according to another embodiment of the present invention
- Figure 10 is a concrete pressurized according to another embodiment of the present invention
- Detailed sectional drawing which shows the state which chemical liquid is inject
- 9 and 10 show the injection of the chemical liquid through the connection of the third pipe and the fourth pipe.
- the 10 shows that the chemical liquid pumping unit 300 operates to inject the chemical liquid 30 into the inner circumferential surface of the concrete pressure pipe 10 through the annular slit 230.
- the annular slit 230 is formed by connecting the other side 252 of the third pipe 250 and the expansion inlet 262 of the fourth pipe 260.
- the chemical liquid 30 is annularly injected into the inner circumferential surface of the concrete pressure pipe 10 through the annular slit 230 to generate and activate a lubricating layer of concrete.
- the gap of the annular slit 230 is preferably formed in about 2 mm, as described above.
- FIG. 11 is a flow chart of the lubricating layer activation method of the concrete pressure pipe according to an embodiment of the present invention.
- the lubrication layer activation method of the concrete pressure pipe concrete pressure feed pipe for quantitatively injecting the chemical liquid containing a concrete admixture or cement paste in an annular form on the inner peripheral surface of the concrete pressure pipe
- the expected pressure calculation step (S100) for calculating the expected pressure per unit area of concrete according to the dimensions of the concrete conveying pipe, the properties of the concrete and the flow of concrete, and the piping pressure per unit area of the concrete in the concrete conveying pipe
- Pipe internal pressure measurement step (S200) for measuring the measurement
- the chemical liquid quantitative calculation step (S300) for calculating the quantification of the chemical liquid injected in accordance with the flow amount of concrete
- the first internal pressure comparison step (S400) for determining the injection of the chemical liquid by comparing the internal pressure of the pipes, and the expected When the internal pressure of the pipe is higher than the pressure
- the process of calculating the expected pressure and the appropriate amount of the chemical liquid that changes according to the pressure of the pressure feed pipe and the flow amount of the concrete is preferably carried out repeatedly.
- the injection and stopping of the chemical solution are performed through the first internal pressure comparison step S400 and the second internal pressure comparison step S600.
- the two comparison steps compare the expected pressure and the pipe pressure, and inject the chemical liquid when the pipe pressure is higher than the expected pressure, and stop the chemical liquid injection when the pipe pressure is lower than the expected pressure.
- the chemical liquid is injected only when the concrete pressure is not smooth, minimizing waste of materials and energy, and effectively lubricating layer through the physical method Activate the lubrication layer, making it possible to sustain the effect.
- the lubricating layer activation device and the lubricating layer activating method of the concrete pressure pipe according to the embodiment of the present invention, the chemical liquid injection unit for injecting the chemical liquid for activating the flow of concrete in the inner peripheral surface of the concrete pressure pipe; And a chemical liquid pumping unit for supplying a fixed amount of chemical liquid to the chemical liquid injection unit; and calculating an expected pressure per unit area of concrete according to the dimensions of the concrete pumping pipe, the properties of the concrete, and the flow of concrete, so that the pressure in the pipe is greater than the expected pressure. It can be seen that it is a basic technical idea that the lubrication layer can be continuously activated throughout the concrete pressure pipe, including a control unit for operating the chemical liquid pumping unit at a high level.
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Abstract
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Claims (7)
- 배관으로 압송되는 콘크리트의 단위면적당 압력을 측정하는 배관내압센서;와,콘크리트 압송 배관의 내주면에 콘크리트의 유동을 활성화시키는 약액을 환형으로 주입시키는 약액주입유닛;과,상기 약액주입유닛에 정량의 약액을 공급시키는 약액펌핑유닛;과,상기 콘크리트 압송 배관의 치수 및 콘크리트의 물성 및 콘크리트의 유동량에 따른 콘크리트의 단위면적당 예상압력을 산출하여, 상기 배관내압센서에서 측정된 배관내압이 상기 예상압력보다 높을 시 상기 약액펌핑유닛을 작동시키고, 상기배관내압센서에서 측정된 상기 배관내압이 상기 예상압력보다 낮을 시 상기 약액펌핑유닛의 작동을 중지시키는 제어유닛;을,포함하는 것을 특징으로 하는 콘크리트 압송 배관의 윤활층 활성화 장치.
- 제1항에 있어서,상기 약액은, 콘크리트 혼화제 내지 시멘트 페이스트를 포함하는 것을 특징으로 하는 콘크리트 압송 배관의 윤활층 활성화 장치.
- 제1항에 있어서,상기 약액주입유닛은,콘크리트가 배출되는 압송 배관과 연결되는 제1연결수단;이 일측에 구비되는 파이프;와,외경의 반지름이 상기 제1파이프의 내경의 반지름보다 1~3mm 만큼 작아지도록 점진적으로 축소되는 축소토출부;가 일측에 구비되고, 콘크리트가 유입되는 압송 배관과 연결되는 제2연결수단;이 타측에 구비되는 제2파이프;와,상기 제1파이프의 타측과 상기 제2파이프의 일측을 연결시키되, 상기 제1파이프의 타측 및 상기 제2파이프의 상기 축소토출부 사이의 환형 슬릿(slit)에 약액을 공급시키는 적어도 두 개 이상의 약액주입구;가 외주부에 균등하게 배치되는 약액주입연결구;를,포함하는 것을 특징으로 하는 콘크리트 압송 배관의 윤활층 활성화 장치.
- 제1항에 있어서,상기 약액주입유닛은, 콘크리트가 유입되는 압송 배관과 연결되는 제3연결수단;이 일측에 구비되는 제3파이프;와,내경의 반지름이 상기 제3파이프의 외경의 반지름보다 1~3mm 만큼 커지도록 점진적으로 확대되는 확대유입부;가 일측에 구비되고, 콘크리트가 배출되는 압송배관과 연결되는 제4연결수단;이 타측에 구비되는 제4파이프;와,상기 제3파이프의 타측과 상기 제4파이프의 일측을 연결시키되, 상기 제3파이프의 타측 및 상기 제4파이프의 상기 확대유입부 사이의 환형 슬릿(slit)에 약액을 공급시키는 적어도 두 개 이상의 약액주입구;가 외주부에 균등하게 배치되는 약액주입연결구;를,포함하는 것을 특징으로 하는 콘크리트 압송 배관의 윤활층 활성화 장치.
- 제1항에 있어서,상기 약액펌핑유닛은,상기 약액주입유닛에 공급되는 상기 약액의 역류를 방지하는 체크밸브;와,상기 약액주입유닛에 정량의 상기 약액을 공급하기 위한 피스톤 방식의 약액펌프;와,상기 약액을 교반시키며 저장하는 약액저장부;를,포함하는 것을 특징으로 하는 콘크리트 압송 배관의 윤활층 활성화 장치.
- 제1항에 있어서,상기 제어유닛은,콘크리트의 유동량에 따라 상기 약액주입유닛에 공급되는 상기 약액의 공급정량을 산출하여, 상기 약액펌핑유닛이 상기 공급 정량만큼 상기 약액을 상기 약액주입유닛에 공급하도록 제어하는 것을 특징으로 하는 콘크리트 압송 배관의 윤활층 활성화 장치.
- 콘크리트 압송 배관의 내주면에, 콘크리트 혼화제 내지 시멘트 페이스트를 포함하는 약액을 환형으로 정량 주입시키는 콘크리트 압송 배관의 윤활층 활성화방법으로써,상기 콘크리트 압송 배관의 치수 및 콘크리트의 물성 및 콘크리트의 유동량에 따른 콘크리트의 단위면적당 예상압력을 산출하는 예상압력산출단계;와,상기 콘크리트 압송 배관 내의 콘크리트의 단위면적당 배관압력을 측정하는배관내압측정단계;와,콘크리트의 유동량에 따라 주입되는 상기 약액의 정량을 산출하는 약액정량산출단계;와,상기 예상압력산출단계에서 산출된 상기 예상압력과, 상기 배관내압측정단계에서 측정된 상기 배관내압을 비교하여 상기 약액의 주입을 결정하는 제1내압비교단계;와,상기 예상압력보다 상기 배관내압이 높을 시 정량의 상기 약액을 주입시키는약액주입단계;와,상기 예상압력산출단계에서 산출된 상기 예상압력과, 상기 약액주입단계 이후에 측정된 배관의 내압을 비교하여 상기 약액의 주입 중단을 결정하는 제2내압비교단계;와,상기 예상압력보다 상기 약액주입단계 이후에 측정된 배관의 내압이 낮을 시상기 약액의 주입을 중단시키는 약액주입중단단계;를,포함하는 것을 특징으로 하는 콘크리트 압송 배관의 윤활층 활성화 방법.
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